Building-block.



l P. BURGHARTZ.

BUILDING BLOCK. APrLIoATIoN FILED No?. 17, 1910.

1,047,614. Patented Dec.,17,1912. l

3 wv@ nio@ FERDINAND BURCHVARTZ, NEW YORK, Y.

BUILDING-BLOCK. l

Specification of Letters Patent.

Patented Der.. l?, 1912.

Application filed November 17, 17.910. Serial No. 592,824.

To all whoml'it may concern:

Be it' known that I, FERDINAND Bonoli- An'rz, a citizen of the UnitedStates, and resident of the borough of- Manhattan, city,` "county, andState of New York, have in vented certain new and useful Improvements isa specication.

My invention relates to blocks sueltas are used in buildings,particularly for the construction of floors and ceilings, and has for inBuilding-Blocks, of which tlie following vits object to 'provide a novelsectional block which will be readily manufactured, light in weight,fire-proof, and a good heat-insulator.

Various forms of my invention are illustrated in the accompanyingdrawings, in which- Figure l is a plan `View showing a port-ion of afloor made with square blocks embodying my invention; Fig. 2 is aperspective View of two sections forming a block such as represented inF ig. l, said sections being shown separated; Fig. 3 is a. perspectiveview, similar to Fig. 2, showing another -way of constructing squareblocks according to my invention; and Fig. lis a plan view of ahexagonal block embodying my invention.

In veach vof the forms shown, the block co'mln'ises two like hollowsections each having parallel main surfaces, adapted to form the top andbottom surfaces of the bloclr respectively when 'the blocks are used toconstruct a, floor or ceiling. Each block is of polygonal shape, and theopen meeting surfaces of companion sections are disposed digunetricallywith respect to they polygonal -outline of the block, and preferably, as

shown, such meeting surfaces are .in planes perpendicular tothefparallel surfaces above mentioned.

Turning more specially to the blocks illus- .ti-ated by Figs. l and 2, Ihave shown each 'block section shaped substantially as a. hollowtriangular' prism havingy a horizontal top surface A, abottom surface A.parallel thereto, converging vertical side walls A2, and -an openvertical surface A3 which eX- tends between the ends of the side wallsand which 'I term a meeting surface since it is adapted to fit againstthe corresponding surface of a companion section to form a blocksquareoutline, as shown in Fig. 1L Each bleclrseetion is hollow and openat the meeting surface A3 but closed otherwise. Tfl-Then two companionsections are fitted together, they form a hollow block the walls of`which are closed entirely. -The meeting surfaces A3 are vertical, thaty is, perpendicular to the parallel surfaces A, A', and in the assembledblock the meeting surfaces (indicated by the lines a in Fig. l) aredisposed diametrically with respect to the polygonal (square) outline ofthe block.

prefer to make the block sections with flanges At'extending at thebottom beyond the side walls A2 and adapted to abut against thecorresponding flanges of adj acont blocks'.v as shown in Fig. l, thusleaving spaces between the side walls A2 of adjoining bloclrs, toreceive the customary supporting rods (two of which are indicated at D)and the cement i'illing not shown) in which they are i embedded asusual. Of course the improved 4blocks may be 4applied in 'other ways,and l have used the terms top and bottom, horizontal and vertical, onlyfor the salte of convenience of description, since it will he obviousthat the blocks might be used in other positions.

The block illustrated in Fig. l lillois from that shown in l and 2 onlyby the fact that 'the diamotral meeting surfaces il are parallel to oneset of sido walls BZ, instead 'of being arranged diagonally as in llig.l andi?. The outline of each bloeit section is thereforerectangulaiinstead of tri oular.

Fig. 3 represents a hexagonal bloei embodying my invention.lllachseciion i .p-A onoidal in outline. with the open meeting surfaces(indicated at c) ari :geil in a diagonal. It will be understood that inother respects the forms shown in 3 and 4 agree with the one shown inFigs. l and 2, hence further description is deemed unnecessary,corresponding parts being designated by reference letters bearing likeindices.

The block sections herein described are made by molding or otherwise`from cement or other suitable material.

l claim as my invention:

A completely closed hollow sectional po-A lygonal building block havinga single inner chamber occupying the whole interior thereof and composedof two similar hollow half sections comprising respectively integraltop,

bottom and angled side walls, said sections opening into each otherdiarnetricalyfrom specification in the presence of two subscrih- Y endto end thereof and being provided reing Witnesses. spectively alongtheir said angled side Walls with integral angled outward spacingflanges FERDINAND. BURCHARTZ 5 which together /form a continuous flangesur Witnesses:

rounding the block. 1 JOHN LOTKA, Intestimony whereof I have signed thisCH. MATH.

